531245 has 16 divisors (see below), whose sum is σ = 749952. Its totient is φ = 356160.

The previous prime is 531239. The next prime is 531253. The reversal of 531245 is 542135.

It is not a de Polignac number, because 531245 - 2⁴ = 531229 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 9 and base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 344 + ... + 1086.

It is an arithmetic number, because the mean of its divisors is an integer number (46872).

2⁵³¹²⁴⁵ is an apocalyptic number.

531245 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

531245 is a deficient number, since it is larger than the sum of its proper divisors (218707).

531245 is a wasteful number, since it uses less digits than its factorization.

531245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772.

The product of its digits is 600, while the sum is 20.

The square root of 531245 is about 728.8655568759. The cubic root of 531245 is about 80.9900409439.

The spelling of 531245 in words is "five hundred thirty-one thousand, two hundred forty-five".